Pushrod cup ends turning blue

Pushrod oiling is 100%. There should be oil coming up the pushrods as soon as you have pressure in the oil system. It won't be gallons but you should see it. I'm almost thinking that because they were dry for a while, the heat might have gotten in them before the oil started reaching them. Like you say - an "initial start up issue". Question then becomes is that enough oil volume? If you really had a "not enough" situation you would have burnt the ends off during that blast. So maybe replace the parts that show damage, and this time prelube until they all show oil. The upside is you don't have to rotate the engine while preoiling...lol.